[cfe-dev] Using "-x c++" with clang_parseTranslationUnit()

[Stefan Seefeld]

On 2011-03-19 18:13, Argyrios Kyrtzidis wrote:
> Could you post some code?

Here is the relevant snippet ('bpl' is an alias to boost::python, and 
cpp_flags is a Python list with additional compiler flags, such as 
-I..., -D..., etc.):

   char const **args = new char const*[bpl::len(cpp_flags) + 2];
   args[0] = "-x";
   args[1] = "c++";
   for (size_t i = 0; i != bpl::len(cpp_flags); ++i)
     args[i + 2] = bpl::extract<char const *>(cpp_flags[i]);

   CXIndex idx = clang_createIndex(0, 1);
   CXTranslationUnit_Flags flags = 
CXTranslationUnit_DetailedPreprocessingRecord;
   CXTranslationUnit tu =
     clang_parseTranslationUnit(idx, input_file,
                    args,
                    bpl::len(cpp_flags) + 2,
                    0,  // unsaved_files
                    0,  // num_unsaved_files
                    flags);


Running this on a C++ source file with extension '.h' will first warn 
about unused '-x c++', and then cause an error since its header search 
path doesn't include standard C++ headers.

(I'm in fact trying to parse clang code itself to generate a cross 
reference via Synopsis.)

Thanks,
         Stefan

-- 

       ...ich hab' noch einen Koffer in Berlin...